My mum owns a small bookstore in NZ. The reporting software she currently uses is not very easy to use or informative. She wanted a way to display the top sellers for a day, week, etc to assist in keeping track of stock levels. I put together a small app that allows for interactive visualisation of the top-sellers for a selected book category over a certain number of days.
The app is written in python and makes extensive use of the Pandas and Bokeh libraries. (Side note, Bokeh is awesome for building interactive visualisations!). The test version code can be found here dashboard code. The test version is deployed on Heroku and can be seen working here dashboard app (Not working on Safari at the moment for some reason).